WATCHES: Severe Thunderstorm Watch Number 609

WWUS20 KWNS 162258
SEL9
SPC WW 162258
AZZ000-170400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 609
NWS STORM PREDICTION CENTER NORMAN OK
455 PM MDT THU AUG 16 2007

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

SOUTHERN AND CENTRAL ARIZONA

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 455 PM UNTIL
1000 PM MDT.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTHWEST OF
PHOENIX ARIZONA TO 65 MILES EAST SOUTHEAST OF GILA BEND ARIZONA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 605...WW 606...WW
607...WW 608...

DISCUSSION...TSTMS HAVE CONSOLIDATED ON PARTS OF AZ'S ERN RIM IN THE
PAST HOUR...WITH STRONG HEATING CONTINUING IN DEEPLY MIXED
ENVIRONMENT OVER THE LWR DESERTS TO THE WEST. GIVEN MODEST BUT
FAIRLY DEEP LYR OF UNIDIRECTIONAL ELY FLOW...EXPECT ORGANIZED W/WSW
STORM PROPAGATION TO CONTINUE. COUPLED WITH LARGE T/TD SPREADS IN
THE LWR DESERTS...SETUP COULD SUPPORT SCTD SWATHS OF DAMAGING
DOWNDRAFTS THROUGH MID EVENING.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION
VECTOR 08015.

..CORFIDI

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@PO.UIUC.EDU with
"unsub wx-storm" in the body of your message. For more information write chris@lib.siu.edu.